<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<style>
			h3,p{
				color: red;
			}
			/*后代选择器*/
			.h3 p{
				color: red;
			}
			.geshi1{
				color: red;
				font-size: 50px;
				text-decoration: underline;
			}
			.geshi2{
				color: red;
				text-decoration: underline;
			}
			.geshi3{
				font-size: 50px;
				text-decoration: underline;
			}
			.red{
				color: red;
			}
			.fond{
				font-size: 50px;
			}
			.underline{
				text-decoration: underline;
			}
		</style>
	</head>
	<body>
		<h3 class="h3">
			<p>dasdasd</p>
		</h3>
		<h3>大撒旦发个</h3>
		<p>烦烦烦烦烦烦烦烦烦方法</p>
		<p class="geshi1">段落1</p>
		<p class="geshi2">段落2</p>
		<p class="geshi3">段落3</p>
		<p class="red fond underline">收到就好</p>
	</body>
</html>
